package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Qualifier("redisTemplate")
    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);

//        //4.保存到session
//        session.setAttribute("code",code);

        //4.保存到redis
        stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY +phone,code,2, TimeUnit.MINUTES);

        //5.发送验证码
        log.debug("发送短信验证码：{}",code);
        //返回
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        //校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }

        //检验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY +phone);
        String code = loginForm.getCode();
        if(cacheCode==null||!cacheCode.equals(code)){
            return Result.fail("验证码错误！");
        }


        //3.  一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();//mybatis-plus中的查询方法，query等价于 select * from user
        //上面继承了ServiceImpl<UserMapper, User>实际上就是继承了BaseMapper<User>，可以直接单表查询

        //判断是否存在
        if (user == null) {
            //不存在，创建新用户并保存
            user = createUserWithPhone(phone);
        }

        String token = UUID.randomUUID().toString(true);
        //将user对象转化为hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);

        Map<String,Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(), CopyOptions.create().
                setIgnoreNullValue(true).setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));

        //存储
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY+token,userMap);

        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
//        //保存用户信息到session
//        session.setAttribute("user",user);
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX +RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
